A virtual world; usually at least partially self-contained, or apparently so, may or may not include sentient beings; generally part of a cultural community across computer/cyberspace/matrix networks. The Known Net consists of literally trillions of interconnected virchworlds, but not all virchworlds are well-connected to the physical universe.

Virchuniverse - Text by M. Alan KazlevGenerally, an aggregation or collection of thousands of interconnected virchworlds or cybercosms, all sharing the same basic ontology and lay-out, to make traveling from one to the other easier. Sometimes also used to designate a single extremely large virchworld.